Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, nhung don
thanh quan » thanh xuan, thanh tuan, nhanh quang
hoc thiet » hoc thieu, hoc thuyet, toc thieu
hanh dung » thanh dung, anh dung, hanh dong
hang cong » dang cong, hang nong, bang cong
quan ban » quang ban, qua ban, quan van

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thiet) or (hoc hien)) tach - hanh dung luan ((nhung cong) OR (hang cong)) thanh quan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thiet) OR (hoc hien)) tach - hanh dung luan ((nhung cong) OR (hang cong)) thanh quan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thiet) or (hoc hien)) tach - hanh dung luan ((nhung cong) OR (hang cong)) thanh quan ban".
• Adding a wildcard symbol may retrieve word variants: ((hoc thiet) or (hoc hien)) tach - hanh dung luan ((nhung cong) OR (hang cong)) thanh quan ban*.